:root{--bg:#f4f7fb;--card:#fff;--text:#17212b;--muted:#6b7280;--line:#dbe3ee;--primary:#2563eb;--primary2:#1e40af;--danger:#dc2626;--radius:14px}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}.top{height:58px;background:#102033;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 22px;box-shadow:0 2px 14px rgba(0,0,0,.18)}.top b{font-size:17px}.top nav{display:flex;gap:8px}.top a{color:#dbeafe;text-decoration:none;padding:8px 10px;border-radius:9px}.top a:hover{background:rgba(255,255,255,.12)}main{padding:20px}.box{max-width:760px;margin:42px auto;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 10px 30px rgba(20,40,80,.08)}.box h2{margin-top:0}.err{background:#fff1f2;border:1px solid #fecdd3;color:#9f1239;padding:10px 12px;border-radius:10px;margin:10px 0}label{display:block;font-size:13px;color:#374151;margin:9px 0 5px}input,select,button,textarea{font:inherit}input,select,textarea{width:100%;height:38px;border:1px solid var(--line);border-radius:9px;background:#fff;padding:7px 10px}input[type=color]{padding:3px;width:46px}.row{display:flex;gap:12px;align-items:end;flex-wrap:wrap}.row label{min-width:170px}.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:12px 0;box-shadow:0 4px 18px rgba(20,40,80,.04)}button{border:1px solid var(--line);background:#fff;color:#111827;border-radius:9px;height:36px;padding:0 12px;cursor:pointer}button:hover{border-color:#9bb3d8}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary2);border-color:var(--primary2)}.btn-danger{background:#fff;color:var(--danger);border-color:#fecaca}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:6px 14px}.grid label{display:flex;align-items:center;gap:8px;margin:0}.grid input{width:auto;height:auto}table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden}th,td{border-bottom:1px solid var(--line);padding:10px;text-align:left;font-size:13px}th{background:#f8fafc}.designer{display:grid;grid-template-columns:330px 1fr;gap:18px;min-height:calc(100vh - 86px)}.side{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:0 8px 25px rgba(20,40,80,.06);height:calc(100vh - 86px);overflow:auto;position:sticky;top:70px}.side h3{margin:0 0 12px}.side .group{border-top:1px solid var(--line);padding-top:13px;margin-top:13px}.button-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.workspace{background:#e9eef6;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 8px 25px rgba(20,40,80,.06)}.toolbar{display:flex;align-items:center;gap:10px;padding:12px;background:#fff;border-bottom:1px solid var(--line)}.toolbar select{max-width:320px}.canvas-wrap{height:calc(100vh - 138px);overflow:auto;padding:28px;background:linear-gradient(45deg,#e3e9f2 25%,transparent 25%),linear-gradient(-45deg,#e3e9f2 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e3e9f2 75%),linear-gradient(-45deg,transparent 75%,#e3e9f2 75%);background-size:24px 24px;background-position:0 0,0 12px,12px -12px,-12px 0;display:flex;align-items:flex-start;justify-content:center}.canvas-shell{background:#fff;border-radius:14px;padding:18px;box-shadow:0 18px 50px rgba(0,0,0,.18)}#labelCanvas{display:block;background:#fff;border:2px solid #1f2937;box-shadow:0 0 0 1px #fff;cursor:crosshair;max-width:none;max-height:none}.hint{font-size:12px;color:var(--muted);line-height:1.45;margin:8px 0}.pill{display:inline-flex;align-items:center;gap:4px;border:1px solid var(--line);background:#f8fafc;border-radius:999px;padding:4px 8px;font-size:12px;color:#475569}.props{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:10px;margin-top:10px}.two{display:grid;grid-template-columns:1fr 1fr;gap:8px}@media(max-width:900px){.designer{grid-template-columns:1fr}.side{position:static;height:auto}.canvas-wrap{height:auto;min-height:520px}.top{height:auto;align-items:flex-start;gap:10px;flex-direction:column;padding:14px}.top nav{flex-wrap:wrap}main{padding:12px}}